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Warn if returndatasize/returndatacopy is used

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Alex Beregszaszi 2017-05-24 21:51:54 +01:00 committed by Yoichi Hirai
parent 9ff3064d03
commit 05af6c9255
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GPG Key ID: E7B75D080FCF7992
2 changed files with 20 additions and 1 deletions
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20
libsolidity/inlineasm/AsmAnalysis.cpp
View File

@ -65,6 +65,7 @@ bool AsmAnalyzer::operator()(assembly::Instruction const& _instruction)
auto const& info = instructionInfo(_instruction.instruction);
m_stackHeight += info.ret - info.args;
m_info.stackHeightInfo[&_instruction] = m_stackHeight;
warnOnFutureInstruction(_instruction.instruction, _instruction.location);
return true;
}
@ -149,6 +150,7 @@ bool AsmAnalyzer::operator()(FunctionalInstruction const& _instr)
if (!(*this)(_instr.instruction))
success = false;
m_info.stackHeightInfo[&_instr] = m_stackHeight;
warnOnFutureInstruction(_instr.instruction.instruction, _instr.location);
return success;
}
@ -431,7 +433,6 @@ Scope& AsmAnalyzer::scope(Block const* _block)
solAssert(scopePtr, "Scope requested but not present.");
return *scopePtr;
}
void AsmAnalyzer::expectValidType(string const& type, SourceLocation const& _location)
{
if (!m_julia)
@ -443,3 +444,20 @@ void AsmAnalyzer::expectValidType(string const& type, SourceLocation const& _loc
"\"" + type + "\" is not a valid type (user defined types are not yet supported)."
);
}
void AsmAnalyzer::warnOnFutureInstruction(solidity::Instruction _instr, SourceLocation const& _location)
{
switch (_instr)
{
case solidity::Instruction::RETURNDATASIZE:
case solidity::Instruction::RETURNDATACOPY:
m_errorReporter.warning(
_location,
"The RETURNDATASIZE/RETURNDATACOPY instructions are only available after "
"the Metropolis hard fork. Before that they act as an invalid instruction."
);
break;
default:
break;
}
}

1
libsolidity/inlineasm/AsmAnalysis.h
View File

@ -97,6 +97,7 @@ private:
Scope& scope(assembly::Block const* _block);
void expectValidType(std::string const& type, SourceLocation const& _location);
void warnOnFutureInstruction(solidity::Instruction _instr, SourceLocation const& _location);
int m_stackHeight = 0;
julia::ExternalIdentifierAccess::Resolver m_resolver;